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silky lupine

Habit Plants perennial, 2–10(14) dm.
Stems

erect, not woody, pubescent.

Leaves

cauline, rarely with some leaves clustered near bases;

leaflets 6–9, 20–70 × 4–12 mm, linear-elliptic to oblanceolate;

tips acute, often apiculate;

surfaces strigillose;

petioles (18)23–90 mm.

Inflorescences

9–17(24) cm;

peduncles 3–8.7 cm;

pedicels 3–5(7) mm.

Flowers

calyces 4–10 mm, not spurred, sometimes slightly saccate;

lips subequal to unequal;

corollas 12–16 mm; whitish to blue;

banners typical type, abaxially pubescent; spot white, yellow or brown.

Fruits

1.6–3.5 cm, pilosulose.

Seeds

2–6.

Lupinus truncatus

Lupinus sericeus

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Disturbed areas, roadsides, meadows, sagebrush open forests. Flowering May–Aug. 50–2200 m. BW, Casc, Col. ID, NV, WA; north to British Columbia, northeast to Alberta, east to WY, southeast to NM. Native.

This species may be locally abundant in recently burned areas.

Source Flora of Oregon, volume 2 draft
Paul Severns, Stephen Meyers, Christopher Royce
Sibling taxa
L. affinis, L. albicaulis, L. albifrons, L. arboreus, L. arbustus, L. arbustus x Lupinus oreganus, L. arbustus x Lupinus sericeus, L. argenteus, L. bicolor, L. brevicaulis, L. breweri, L. latifolius, L. lepidus, L. leucophyllus, L. leucophyllus x Lupinus sericeus, L. littoralis, L. luteolus, L. microcarpus, L. nevadensis, L. onustus, L. oreganus, L. polyphyllus, L. pusillus, L. rivularis, L. sabinianus, L. sericeus, L. sulphureus, L. tracyi, L. uncialis
L. affinis, L. albicaulis, L. albifrons, L. arboreus, L. arbustus, L. arbustus x Lupinus oreganus, L. arbustus x Lupinus sericeus, L. argenteus, L. bicolor, L. brevicaulis, L. breweri, L. latifolius, L. lepidus, L. leucophyllus, L. leucophyllus x Lupinus sericeus, L. littoralis, L. luteolus, L. microcarpus, L. nevadensis, L. onustus, L. oreganus, L. polyphyllus, L. pusillus, L. rivularis, L. sabinianus, L. sulphureus, L. tracyi, L. uncialis
Synonyms Lupinus leucopsis, Lupinus leucopsis var. mollis, Lupinus leucopsis var. shermanensis, Lupinus ornatus, Lupinus sericeus var. fikeranus, Lupinus sericeus var. flexuosus, Lupinus sericeus var. sericeus, Lupinus sericeus var. wallowensis
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